Charles stanley rhoads



C. S. RHOADS, J12.

SIGNAL RECEIVING DEVICE. APPLICATION FILED we. a, 1911.

Patented Aug. 4, 191* UNITED STATES PATENT OFFICE.

cEAnLns STANLEY RHOADS, an, or SANDWICH, ILLINoIs, ASSIGNOB, BY MESNE ASSIGNMENTS, r0 HALL SWITCH & SIGNAL coMrANY, A CORPORATION or MAINE.

SIGNAL-RECEIVING DEVICE.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application filed August 8, 1911. Serial No. 842,951.

To all whom-it may concern I Be it known that I, CHARLns STANLEY RHoAos, Jr., a citizen of the United States, residing at Sandwich, in the county of Dekalb and State of Illinois, have inventeda certain new and useful Improvement in SignalReceivin Devices, of which the following is a ful, clear,'conci se, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to substation receiving devices for use in signaling systems andv more particularly to the arrangement of receiving devices in systems of the character in which impulses are utilized to select a particular substation instrument for signaling purposes. In the specific from of the device herein, it is arranged for selective operation and the construction is such that actuating and release impulses may be used to carry out the functions desired.

It is the prime object of my invention to arrange a substation device of th s character in such a way that auxiliary signal circuit control contacts are provided in add tion to the si nal circuitcontrol contacts d1- rect-ly contro led by a step-by-step element when such is utilized in connection with my invention.

In the preferred form of the invention, I utilize preferably a polar relay which through the agency of a local battery is adapted to control a step-up magnet and the release magnet, both of which are associated with a step-by-step element. A sluggish relay is also associated with the magnets aforesaid and controls a contact which controls the signal circuit of the substation.

I will explain my invention more in detail by reference to the accompanying drawing illustrating a system arranged in accordance with my invention. In this illustration I show a central station A and substations B, C and D. A line circuit preferably consisting of the two line wires 1 and 2 unites all of the stations together;

At the central station I have two keys 3 and 4 respectively, of which key 3 is ada ted to send impulses of a given character rom the battery 5 over the hue wires 1 and 2, and key 4 is adapted to send impulses of a reverse polarity by means of the battery 6 over the same line wires. The keys 3 and 4 thereof preferably connected with said armature to furnish the current when said armature contacts with either contact point 9 or 10. The contact 9 is connected by means of a conductor 12 with the winding of a step-up magnet 13 and a conductor 14: continues the connection to a sluggish relay 15 from whence a conductor 16 completes the circuit of the battery 11. The contact point 10 is connected by means of a conductor 17 to the winding of a release relay 18 from which the circuit extends by means of a conductor 19 to the conductor 14, thence through the winding of the sluggish relay 15 and conductor 16 back to the battery 11.

A step-by-step element 20 having a pointer 21 i controlled by a pawl 22, which pawl is actuated by the armature 23 of the magnet 13. A' holdin pawl 24 is employed the function 0 which is obvious. The release relay 18, by virtue of its armature 25 and arm 26, serves, when actuated, to disengage both pawls 22 and 2 1 from the teeth of the element 20 to thereby permit the return of said element 20 against its stop 27, through the agency of the spring 28. The pointer 21 is adapted to engage a contact 29 which is directly connected with a local signal 30, the circuit from there being continued by means of the conductor 31 to one pole of the battery 11. This circuit further extends from the other terminal of said battery through the conductor 16, contact 33, armature 34, conductor 35 to the arm 21 of the step-by-step element 20. A spring 35 normally maintains a closure of the circuit between the armature 34. and contact 33.

Now when, say, positive impulses are transmitted over the line'wires 1 and 2, armature 8 engages contact 9, thereby energizing magnet 13 which actuates the armature 23 to step-up the element 20. Should these impulses cease, the elements 20 remain in the position last occupied until an impulse of negative polarity is transmitted over the line wires, at which time the armature 8 engage contact 10, thereby energizing the magnet 18 which attracts its armature 25, thereby disengaging pawls 22 and- 24 from the teeth of the element 20 so that it may return to normal. v

It will be seen that all .of the impulses transmitted through the magnet 13, also the impulse or impulses transmitted through the magnet 18 pass serially through the re lay 15. Now the first step-up impulse transmitted actuates not only the magnet 13, but also the relay 15 which is' sluggish only so far as release is concerned, and which therefore draws up its armature promptly upon initial energization. This first impulse therefore breaks the contact between the armature 3e and the contact 33 and opens at each substation the signal circuit. The arms 21 of the various step-by-step element occupg different angular positions so that each su station answers to a number of impulses difierent from its companion stations.

Now assuming that a sufiicient number of ositive impulses have been transmitted to bring the arm 21 of the substation B into engagement with the contact 29 the signal circuit is completed at this contact at this particular station. The signal circuit how-- ever is open at contact 33 and would remain open if succeeding impulses were sent with such a short time interval between them that the relay 15 did not have time to release. If the impulses however are discontinued immediately the arm 21 engages the contact 29, then no current is present in either the ma ets 13 and 18 or'the relay 15 and if the digcontinuance of the impulses is long enough, armature 34 is released and closes the signal circuit at all of the stations, but the signal 30 of substation B onlywill respond as the arm 21 of that particular station alone is in association with its associated contact. It will thus be seen that the signal circuit is finally made at the contact 33. This is a great advantage because the adjustment of the arm 21 need not then be so accurate as heretofore. Now after the signal has operated a suflicient length of time, an impulse of reverse polarity is transmitted from the central station and this operates the magnet 18 and the relay 15, whereby the relay 15 opens the signal circuit at the contact 33 so as to avoid any sparking between the arm 21 and its associated contact 29. The contact 33 in association with the armature can be better constructed to accommodate any sparking than can the movable arm 'with its associated contact. Controlling the signal circuit at the contact 33 also gives .another advantage, namely that in stepping past a contact 29, for instance, when a station beyond the one under consideration is being called, the bell 30 does not tap because the signal circuit is open at contact 33. This is also true when the release impulse is sent because the signal circuit is open at thecontact 33 before the elements begin to move in the reverse direction.

The various advantageous features of my improved substation signal receiving device will thus be apparent and while I have.

described herein one embodiment which my invention may take, I do not so limit myself as my invention may be broadly applied and is also susceptible of many modifica- .and electromagnetic means or closing said signal circuit upon cessation of the impulses subsequently to the initial circuit closure by said element. 'I

2. A signal receiving device having a step-by-step element, electromagnetic stepupmeans for said element, electromagnetic release controlling means for said element,

a signal circuit cor trolled by said element, and means to! render said signal circuit inoperative during the release movement of said element after said element has been stepped past its circuit closing position. 1

3. A signal receivin step-by-step element, e ectromagnetic stepup means for said element, electromagnetic release controlling means for said element, a signal circuit controlled by said element, and electromagnetic means operablempon cessation of impulses for closing said signal circuit subsequently to the control 'by said element. 7

4. A signal receiving device having astep-by-step element, electromagnetic ste up means for said element, electromagnetic release controlling means for said element, a signal circuit controlled by said element, and electromagnetic means operable con jointly with said step-up and release con trolling means forcontrolling said signal circuit.

5. A signal receiving device having'a step-by-step element, electromagnetic ste up means for said element electromagnetic release controlling means f a signal circuit controlled by said element, and sluggish electromagnetic means for closingcsaid signal circuit upon cessation of or said element,

devlce having a the impulses subsequently to the circuit closure thereof by said element.

6. A signal receiving device having 9. Lid

step-by-step element electromagnetic stepup means for said element electromagnetic release controlling means ior said element, a signal circuit controlled b said element, electromagnetic means for c osing said signal circuit upon cessation of the impulses, a local source of current and electromagnetic means for associating said source with said three aforesaid electromagnetic means. 7. A signal receiving device having a step-by-step element, electromagnetic stepup means for said element electromagnetic release controlling means :ior said element, a signal circuit controlled b said element, electromagnetic means for c osing said signal circuit upon cessation of im ulses, a local source of current and a po ar relay for associating said source with said three x aforesaid electromagnetic means. 8. A signal receivin device having a step-by-step element, eectromagnetic stepup means for said element, electromagnetic release controlling means for said element,

a signal circuit controlled by said element, and electromagnetic means to render said signal circuit inoperative during the release movement of said element after said element has been stepped past its circuit closing position.

9. signal receiving device having a step-by-step element, electromagnetic means to control the operations of said element, means for moving said element to initial position when released, a signal circuit controlled by said element, and additional means to render said signal circuit inoperative durin the release movement of said element a ter said element has been stepped past its circuit closing position.

In witness whereof, I hereunto subscribe my name this 17th day of July, A. D., 1911.

CHARLES STANLEY RHOADS, JR.

"Witnesses:

HAZEL Jonas, 0. M. WEBMICH.

negates c! this patent may be obtained (or in cent: each, by droning the Commissioner of Barents,

' Washington, D. 0. 

